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Positive Weathering Feedback Compensates Carbonates at Shallow Ocean Depths

Published online by Cambridge University Press:  16 October 2024

Hakim Kaustubh Open the ORCID record for Hakim Kaustubh [Opens in a new window]
Hakim Kaustubh*
Affiliation:
KU Leuven, Institute of Astronomy, Celestijnenlaan 200D, 3001 Leuven, Belgium Royal Observatory of Belgium, Ringlaan 3, 1180 Brussels, Belgium
*
email: [email protected]
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Abstract

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Continental silicate weathering and seafloor carbonate precipitation are key steps in the carbonate-silicate cycle to draw down CO2. Contrary to the classic understanding of negative feedback, silicate weathering can exhibit positive feedback at high temperatures. Taking into account this positive feedback, the compensation depth (CCD) in exoplanet oceans becomes shallower, implying a potential instability in the carbonate-silicate cycle at high temperatures.

Keywords

Carbon CycleCarbonate Compensation DepthPositive Weathering Feedback
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S382: Complex Planetary Systems II: Latest Methods for an Interdisciplinary Approach , December 2022 , pp. 123 - 125
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Berner, R. A., Lasaga, A. C., & Garrels, R. M. 1983, American Journal of Science, 283, 641. doi: 10.2475/ajs.283.7.641 CrossRefGoogle Scholar
Broecker, W. S. & Peng, T.-H. 1987, Global Biogeochemical Cycles, 1, 15. doi: 10.1029/GB001i001p00015 CrossRefGoogle Scholar
Catling, D. C. & Zahnle, K. J. 2020, Science Advances, 6, eaax1420. doi: 10.1126/sciadv.aax1420 CrossRefGoogle Scholar
Hakim, K., Bower, D. J., Tian, M., et al. 2021, Planetary Science Journal, 2, 49. doi: 10.3847/PSJ/abe1b8 Google Scholar
Hakim, K., Tian, M., Bower, D. J., et al. 2023, Astrophysical Journal Letters, 942, L20. doi: 10.3847/2041-8213/aca90c CrossRefGoogle Scholar
Kasting, J. F., Whitmire, D. P., & Reynolds, R. T. 1993, Icarus, 101, 108. doi: 10.1006/icar.1993.1010 CrossRefGoogle Scholar
Krissansen-Totton, J., Arney, G. N., & Catling, D. C. 2018, Proceedings of the National Academy of Science, 115, 4105. doi: 10.1073/pnas.1721296115 CrossRefGoogle Scholar
Maher, K. & Chamberlain, C. P. 2014, Science, 343, 1502. doi: 10.1126/science.1250770 CrossRefGoogle Scholar
Sagan, C. & Mullen, G. 1972, Science, 177, 52. doi: 10.1126/science.177.4043.52 CrossRefGoogle Scholar
Sleep, N. H. & Zahnle, K. 2001, Journal of Geophysical Research, 106, 1373. doi: 10.1029/2000JE001247 CrossRefGoogle Scholar
Walker, J. C. G., Hays, P. B., & Kasting, J. F. 1981, Journal of Geophysical Research, 86, 9776. doi: 10.1029/JC086iC10p09776 CrossRefGoogle Scholar
Zeebe, R. E. & Westbroek, P. 2003, Geochemistry, Geophysics, Geosystems, 4, 1104. doi: 10.1029/2003GC000538 CrossRefGoogle Scholar